Start by placing the 4 boneless, skinless chicken breasts at the bottom of your crockpot.
Cube the 16 ounces of cream cheese and place it on top of the chicken in the crockpot.
Add 1 cup of Buffalo sauce over the cream cheese and chicken.
Sprinkle 1 cup of shredded cheddar cheese over the top, followed by 1 cup of ranch dressing.
Using a mixing spoon, gently stir the ingredients in the crockpot to combine them.
Cover the crockpot and set it to low heat for 4-6 hours or high heat for about 2-3 hours.
Once the chicken is fully cooked, use two forks to shred it directly in the crockpot.
Transfer the dip to a serving dish, and if desired, sprinkle crumbled blue cheese on top.